Improved sediment-extractor for steam-boilers



UNITED STATES PATENT ()FFICE.

ELI THAYER, or wonens'rnn, MASSACHUSETTS IMPROVED SEDlMENT-EXTRACI'OR FOR STEAM-BOILERS; I

Specification forming part of Letters Patent No. 47,232, dated April ll, l8fi5.I i

To all whom it may concern).-

Be it known that I, ELI THAYER, of the city and county of WVorccster, in the State of Mes sachusetts, have invented a new and useful Method of Extracting the Sediment from the Water in Steam-Generators; and I do hereby declare that the following is a full and exact description thereof, reference being bad to the accompanying drawing, and to the letters of reference marked thereon.

The nature of my invention consists in so connecting another vessel with a steam-generator that the water in the generator shall continue to pass through it, depositing therein the sediment, whence it may be reinoved'at anytime without hinderanee to the work of the boiler or engine.

To enable'others skilled in the art to make and use my invent-ion, I proceed to describe its construction and operation.

The figure l in the accompanying drawing represents averticalsection'ot' so much of the same as is outside of the furnace, and exhibits 'all the valves and connections, that part represented by the dotted lines between n and p beingonly a portion of the pipe or tube 0 m,

and lying inside the furnace.

0 represents the vessel which I call the sediment-extractor. a d represent the pipe conveying the water into the same from the boiler; e n p m, the pipe leading from the same into the steam-chamber of the boiler;

g h, the pipe leading from the bottom of the.

extractor into the ash pit under the furnace, through which the sediment is blown off at pleasure.

to represents the point in the boilenhead below the water-line from which the water is taken.

1) represents a stopcock; c, aninverted check-valve; f, a stop cock; d,'the end of the .pipe leading into the extractor; e, the end of the pipe leading from the extractor, and m the other end of the same pipe in the steam-chamber of the boiler.

I will now, proceed to describe the mode of operation of my iiwention. Suppose that the boiler is filled with water to the ordinary height, and that a fire is made in the furnace. That portion of the pipe e m which lies within the furnace-viz, from n to p+is at once exposed to a high heatpand a portionof the water within it is converted into steam, and as the water in the pipe extends tothe same levelas the water in the boiler, the steam presses with equal force toward the two points a and m but as the water moves through the vessel 0 toward-the point ait raises the I valve 0, and by its own actionpreventslits further progress in thatdirection. I The whole force of the steam and the expansion ofthe water is then directed toward the point m. a,

Thewater is thus forced out of the pipe into the'steam-chamber of theboiler, and there remains in'the ascendingpartof the pipethat is, the part near wa -only acolumn of steam' to balance a column of water in the pipe a d. The valve 0, therefore, falls by its own weight and the pressure of the water, and more water is thus furnished to the vessel O and to the pipe 0 m.,' In this waya constant circulation is caused and maintained so that in a short time all the water in the boiler will pass through the vessel 0, which collects and retains the sediment in the following manner: We will'suppose that the pipes leading to and from the extractor are one and a j half inch internal diameter, and, that the vessel 0 is four inches internal diameter and two feet high; also, that the distance of the end of the pipe d.(which-extends a little below the end e of the pipe m e) is two inches from the end 6. I I

It will now be readily seen that the speed of the current through the vessel 0 will be as many times less than it is in the pipes e m and a d as the capacity of the cylinder-O is greater than that of a cylinder two inches long and oneinch and a half in diameter,

which isless than one eighty-fourthof the vessel 0. On account, therefore, of the comparative stillness of the water in the. vessel 0, the sediment falls and collects upon the bottom of the vessel. It may be discharged into the ash-pit at any time by opening for a single second the stop-cock f in the blow-oil.

By closing atthe same time the pipe 9 h.

stop-cock b the sediment maybe blown ofi by I steam passing through the pipe me. t I

.I have used this extractor in connection with my tubular grate with invariable success. In such use I dispense withtheIpipe a m,or, rether, the pipe em'bceomes the grate. The vessel 0, when arranged in the man- In either case I use either hydraulic or extra. nor and for the purposes substantially as set strong iron steam-pipes, especially 'for that forth. 4

part exposed to the'heat of the furnace.

. Havin'gthus described the construction and ELI F modeiof operation of my invention, what I Witnesses:

. claim as my invention, and desire to secure by SABI'N I. POND,

Letters Petent, is -4 (3; F. THAYER. 

